from datetime import datetime
from typing import List, Optional
from loguru import logger
from app.utils.logger import log_exception
from app.services.platform_auth import platform_auth

class HikvisionService:
    def __init__(self):
        # 初始化海康平台的配置
        self.api_host = None
        self.app_key = None
        self.app_secret = None
        
    async def initialize(self, api_host: str, app_key: str, app_secret: str):
        """初始化服务配置"""
        self.api_host = api_host
        self.app_key = app_key
        self.app_secret = app_secret
        
    @log_exception
    async def get_face_records(self, start_time: datetime, end_time: datetime) -> List[dict]:
        """获取指定时间范围内的人脸识别记录"""
        try:
            # TODO: 实现海康平台API调用
            pass
        except Exception as e:
            logger.error(f"获取人脸识别记录失败: {str(e)}")
            raise
            
    @log_exception
    async def validate_face_recognition(self, face_record: dict) -> bool:
        """验证人脸识别是否通过"""
        try:
            # 检查必要字段
            if not all(key in face_record for key in ["confidence", "person_id", "name"]):
                logger.warning("人脸识别记录缺少必要字段")
                return False
                
            # 验证置信度是否达到阈值
            confidence = float(face_record["confidence"])
            if confidence < 0.8:  # 设置80%的置信度阈值
                logger.warning(f"人脸识别置信度不足: {confidence}")
                return False
                
            # TODO: 实现更多验证逻辑（如白名单验证等）
            return True
            
        except Exception as e:
            logger.error(f"验证人脸识别失败: {str(e)}")
            return False
            
    @log_exception
    async def subscribe_face_events(self, callback_url: str):
        """订阅人脸识别事件"""
        try:
            # TODO: 实现事件订阅
            pass
        except Exception as e:
            logger.error(f"订阅人脸识别事件失败: {str(e)}")
            raise
            
    @log_exception
    async def trigger_alarm(self, door_id: str, alarm_type: str):
        """
        触发海康平台报警
        
        Args:
            door_id: 门禁通道编码
            alarm_type: 报警类型，"timeout"(超时未关) 或 "force_open"(强制开门)
        """
        try:
            # 获取认证头
            headers = await platform_auth.get_hikvision_headers()
            
            # 构建报警数据
            alarm_data = {
                "channelCode": door_id,
                "alarmType": "doorTimeout" if alarm_type == "timeout" else "doorForceOpen",
                "alarmTime": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
                "alarmLevel": 1,  # 1-一般，2-重要，3-紧急
                "alarmStatus": 1,  # 1-报警，2-消警
                "description": "门禁超过15分钟未关闭" if alarm_type == "timeout" else "检测到强制开门"
            }
            
            # 发送报警请求
            async with platform_auth.session.post(
                f"{self.api_host}/api/acs/v1/door/alarm",
                headers=headers,
                json=alarm_data
            ) as response:
                if response.status == 200:
                    result = await response.json()
                    if result.get("code") == "0":
                        logger.info(f"海康平台报警触发成功: {door_id}, 类型: {alarm_type}")
                        return
                    else:
                        logger.error(f"海康平台报警触发失败: {result.get('msg')}")
                        raise Exception(f"海康平台报警触发失败: {result.get('msg')}")
                else:
                    logger.error(f"海康平台报警请求失败: {response.status}")
                    raise Exception(f"海康平台报警请求失败: {response.status}")
                    
        except Exception as e:
            logger.error(f"触发海康平台报警异常: {str(e)}")
            raise
